Self-dumping and automatic bailing scow.



APPLICATION FILED MAY 28. 1909.

Patented Sept. 7, 1909.

monzw. a. mum

GA UBETT V. MITCHELL, CF BAYONNE, NEW/V JER$EY.

Specification of Letters Patent.

i,plieation filed May 28, 1909.

Serial No. 498,827.

7 in, may concern: known that i. {l \RRET'L V. Error-mm. ot the tnntcc residing at 'lfhirty-th d street, Bayonne.

ntnte oi? New Jersey, and useful linnnping and rliutor neccrihed and iiindson. itllt ctr-rte in wring specification drawings, it'ornnng it part he same.

This invention relates to it scow having Siiirili decks ii on its opposite lint sides Yhiri hr the introductiini or" waterhnlln rendered self-dumping when loud capable when unlo: ded of rising out water so :hir :is to clear itself o'l l' n 1 tor-onllnst. In the present invention iish the under side ol *neh deck with a: series oi transverse air-clmnihcrs min; t :t to re it great proportion of the scow height out, of the \\21l(l. the space he tween he two sets or nir-clnunhers serving 11s a wider-cuunher tor the introduction o't voter-behest. The series of eir-ehanr terms :1 rellulnr structure which greatly strengthens inch ot the decks. A. 'iilvc hunted in with corner ol the water-chitinl t l -lostheneziih ouch dock and connected with inlet; end outlets through the side oi the snow tsont' tingunwzile, nud is also in conunnnicnlion with the waiter-chzunher.

These eig wires are connected by suitable gearing. with spindles which extend through oil it wrench operates to open and close all the valves at once. When the scow is loaded the upper gnnwnle is but n short distance nhoi' t the water-level end the lower inlets are I211 l t the water, so

of the seow operntes when the load is dis t'lutrged to rinse it wholly out of the water once )lT the zdr-(whntnhcr. that the interllllltlFTll within the scow is rinsed above the level oi the water outside and flows outhoth oi the decks. so that the npplicntioir .d. tips it one side or the other,

Ynrdly through the writer-outlets. 1 t discharge of the wnterdnilhist li htens the scow still further so that it is initially raised and the wnter-lmllnst all d Itflitll'f T he rnlres are then closed and the snow i, readiness to receive another load.

The invention will he understood by rel? erence to the annexed drawing. in which Figure l a plan of the stow with ti upper deck and its :ittnchnicnts remove-o upon the line l-1 in Fig". 1 section on line in fig. 1. upon :1 scale twice the size of Fig. 1. Fig. -1 is 1 l tudinal. section on line l in Fig. i upon the same scale {1S that; figure. I. is a section of one of the ear-spindles Fig.

ot the decks with a where it passes tihrou the some, the View being grentl t' cnlnrg d above Fig. 3. to 8 nro dings-nuts showing the operntion ot' the invention an on n loaded and unloaded scow; Fig. 5 showing the scow loaded nnd in condition tor ing; Fig. (3 shows the snow loaded. with writer-ballast sutlicient to dump it; lire". a

shows the position of the scow when rotating in the water; Fig.8 shows the position of tin scow upon the water when unlonilcd. ntu the wnter-lmllzist discharging. l ig. plain. in section where hzili-hoih oli one oi th wives nnd its inlet lnnnuh.

designates one oil" the dot-ks ol' the soon. and u the opposi'e deck.

7) represents curved ends upon the scor'. and partitions adjacent to such ends forming large air-chambers (,7, hot-ween the decks.

lir-clnunhcrs and c are shown tormed beneath hoth oi? the decks with u water-spire between the same. A poc 'et- 7 is shown at eneh corner of the chanihcr f under t deck. hoxed oil 110111 the end :iii clinuiher (3 or ntcnns of partition 72. and n rnlre is locnted in each of such pockets and coin nected or a hrnnch j with n group of pipes Z. Z7. which are extended through l e side Z oil the scow (is ninr ns possihlc to t it gj gunwnle in, or m.

Tnpei'ing plug-Wires are shown, with n cog'wheel '22 secured upon the plug oi elic t null n spindle 0 extended Ye 'icnil) through both the decks ndjncent to the dives tint. geared thereto by n pinion Fig. 9. which is portly in section, shows valve with it foot "u for attachment: to the side of the pocket and n port nwhich m it opens directly into the pocket, thus discharging the water inwardly or outwardly from the water-chamber Sprocket-wheels g are provided upon the spindles 0 and all of the sprocket-wheels are connected by sprocket-chains 7* which thus connect all the spindles and valves together. The end of each spindle where projected above the deck is shown with a square 0 by which it may be turned, and the deck is provided with a stufling-box s, as shown in Fig. 4t, adjacent to such square. The valves can, therefore, all be opened by turning any one of the squares 0. W hen the valves are closed and the water-space is empty, the scow floats sufliciently high in the water as shown in Fig. 8, to bring the pipes 73 at leastup to the water-level. When the valves are closed, the scow may be loaded and is then depressed in the water, as shown in Fig. 5, by then opening the valves the water flows into the water-space f, entering the lower inlets and discharging air from the upper inlets 7c, and the water-ballast then intro duced operates to sink the scow lower in the water. The inequalities of level which result throw the water-ballast to one side of the scow as shown in Fig. 6, which shifts the center of gravity of the load 0 and causes the scow to upset and discharge the load, the scow turning with the load, and revolving in the water as indicated by the arrows t in Fig. 7. The air-chambers operate immediately to right the scow and to raise it above the water sui'liciently for the waterballast to flow out of the water-inlets, as in dicated by the jets of the water a in Fig. 8. When the water-ballast is all discharged, the valves may be closed and the scow is ready for re-loading.

From the above description it will be seen that the operation of the water-ballast is entirely automatic when the valves are opened, as the opening of the valves not only introduces suflicient water to upset the scow but leaves outlets through which the water-ballast is automatically discharged when the load is dumped and the scow rises in the water.

The operation of the entire apparatus is dependent upon a suitable proportion between the volume of the airchambers (Z, c and e, to the total weight of the scow unloaded, so that the buoyancy of these air chambers in the lower part of the scow may be suilicient when the scow is crowded downward by the load to lift the scow as soon as it is unloaded out of the water sutliciently to discharge the water-ballast. Such proportions are readily calculated and as the water-ballast lies on the air-chambers c it is not, in fact, necessary for the total discharge of such water-ballast that the wateroutlets should be raised above the waterlevel, but only that the tops of the waterchamber 0 should be raised to the water level, as such position causes all the water in the water-chamber to drain from the outlets, even ii they are under the surface of the water.

Having thus set forth the nature of the invention what is claimed herein is:

l. A self-dumping scow having a series of air-chambers extended within the opposite decks, thereby forming cellular decks, such air-chambers proportioned to raise the entire scow except such air-chambers out of the water when unloaded, an intermediate waterchamber extended across the entire width of the scow, two sets of water-inlets in the edges of the scow near the gunwales, and valves connecting such inlet-s with the waterchamber, to dump the scow when loaded.

2. A self-dumping scow having a series 01 air-chambers extended within the opposite decks, thereby forming cellular decks, such air-chambers proportioned to raise the entire scow except such air-chambers out of the water when unloaded, an intermediate water-chamber extended across the entire width of the scow, water-inlets near the water-level when the scow is thus elevated, and valves connecting such inlets with the water-chamber, the location of the inlets permitting the water-ballast to drain from the water-chamber automatically when the scow is unloaded.

3. A self-dumping scow having air-chambers within its opposite decks adapted to raise a great proportion of its height out of the water when unloaded, an intermediate water-chamber, water-inlets near the waterlevel when the scow is thus elevated, valves connecting such inlets with the water-chainhcr, spindles extended through both decks of the scow for actuating the valves, and con nections from such spindles to all the valves for operating them sin'iultaneously.

at. A self-dumping scow having air-chainhers within its opposite decks adapted to raise a great proportion of its height out of the water when unloaded, an intermediate water-chamber, water-inlets near the waterlevel when the scow is thus elevated, valves under both decks in the corners of the scow and connected with such inlets and the waterchamber, and means for connecting all the valves together and operating them simultaneously from either or the decks.

5. A self-dumping scow having air-chambers within its opposite decks adapted to raise a great proportion of its height out of the water when unloaded, an intermediate water-chamber, water-inlets near the waterlevel when the scow is thus elevated, valves under both decks in the corners of the water chamber and connected with such inlets and the water-chamber, spindles extended through the decks adjacent to the valves with stun ing-boxes upon the spindles in the said decks, and gearing spindles and the valves, valves may be turned by from either of the decks.

6. A self-dumping scow having two similar opposite decks, air-chambers (Z within the ends of the scow and air-chambers e, e, beneath each of the decks with pockets partitioned oil from the said chambers in each end of the scow, and a water-chamber between the air-chambers communicating with said pockets, a valve located in each of the said pockets and opening into the waterconnecting all the whereby all of the any of the spindles chamber, and having inlets extended through the edges of the scow near the gunwale, and gearing connecting all of the valves, with mechanism extending through both the decks for actuating" the same.

In testimony whereof I have hereunto set my hand in the presence oi two subscribing 20 witnesses.

GARRETT V. MITCHELL.

it-messes umult CARswELL, SHERMAN S. M1 T0 HELL, 

